Investors engaging in Systematic Investment Plans (SIPs) for mutual funds frequently grapple with the question of which day of the month is optimal for initiating their investments. While some prefer the beginning of the month, others lean towards the middle or end. However, a study conducted by WhiteOak Capital has largely put this debate to rest. The findings suggest that the specific date of an SIP has a minimal impact on long-term returns, indicating that consistency in investing is far more critical than hunting for the perfect date.
Analysis of 28 Years of Data
The research is based on an analysis of the BSE Sensex TRI (Total Return Index) from August 1996 through May 2026. The study evaluated 10-year rolling returns across various dates of every month. By examining nearly three decades of market performance, it became evident that the average returns for investors opting for different dates showed only marginal differences. This confirms that altering the SIP date does not significantly influence the outcomes of long-term wealth creation.
The Reality of Return Variations
According to the analysis, the highest average return recorded was 13.42 percent, while the lowest was 13.36 percent, resulting in a difference of just 0.06 percent. During the early days of the month, the average return hovered between 13.37 and 13.40 percent. Similarly, mid-month dates yielded returns between 13.39 and 13.40 percent. Although returns were slightly higher towards the end of the month, the variance was so minuscule that it cannot be considered significant from an investment perspective.
Impact of F&O Expiry
Many investors attempt to select their SIP dates by monitoring the market volatility surrounding the F&O (Futures and Options) expiry cycle, believing that higher market movement during these days might affect their investment. However, the study found that the long-term returns of SIPs executed around F&O expiry dates were consistent with those made on any other day. When investing for a duration of 10 years or more, the impact of short-term market noise is largely neutralized.
Is Splitting SIPs Across Multiple Dates Beneficial?
Some investors choose to split their monthly investment amount into two or three tranches across different dates, believing this might lead to a better average purchase price. Nevertheless, the study indicates that if one investor puts in 10,000 rupees on a single date, and another splits the same amount across two dates, the difference in the final investment value after 10 years is negligible. This gap amounts to only a few thousand rupees, which is insignificant compared to the overall investment size and total returns.
The Key to Investment Success
Financial experts emphasize that the real key to success in SIP investing is not the date, but regularity and staying invested for a longer period. Investors should prioritize starting early, continuing their investments even during market downturns, and periodically increasing their SIP amounts. The most appropriate date for an SIP is essentially the day the investor receives their salary or regular income, as this helps in maintaining discipline and ensures that the money is invested before it is spent. Always consult a SEBI-registered financial advisor before making significant investment decisions.
